Question

Y, Z, A, B, C and D live on six different floors of the same building. The lowermost floor in the building is numbered 1, the floor above it number 2, and so on till the topmost floor is numbered 6. Only Y lives on the floor between the floors occupied by D and C. B lives on an even numbered floor, but not on floor 6. Z lives on the lowermost floor. D is immediately above B. Who is on the topmost floor?

• A. A
• B. C
• C. Y
• D. D

Answer 1

Answer:

A. A

Solution:

Let's arrange the order using the information given,

1) Z lives on the lowermost floor.

6
5
4
3
2
1	Z

2) B lives on an even numbered floor, but not on floor 6.

3) D is immediately above B.

Case 1:                                                                                                                                    

6
5
4
3	D
2	B
1	Z

 Case 2:

6
5	D
4	B
3
2
1	Z

4) Only Y lives on the floor between the floors occupied by D and C.

Case 1:

6
5	C
4	Y
3	D
2	B
1	Z

Case 2:

6
5	D
4	B
3
2
1	Z

Case 2 gets eliminated as it doesn't satisfy point 4.

Thus, the final arrangement is,

6	A
5	C
4	Y
3	D
2	B
1	Z

Here, we can see that A lives on the topmost floor.

Hence, the correct answer is "A".